In a compelling act of nerd rivalry, engineers at the University of Michigan have created the world's smallest computer—again.

The University held the record for the smallest computer after it created its 2x2x4mm Michigan Micro Mote in 2014. The Micro Mote (or M3) is fully functional and able to retain its programming and data even when it loses power. But then IBM debuted an even tinier "computer" in February, a 1mm x 1mm chip with "several hundred thousand" transistors. Here it is on a pile of salt, for scale:

Engineers at the University of Michigan were not about to be one-upped, and quickly created an even smaller computer, so small it could fit on the tip of a grain of rice: